function People(name) {
    this._name = name;
}
People.prototype = {
    getName() {
        return this._name;
    },
    is() {
        return 'People';
    }
};

function Student(name) {
    this._name = name;
}
inherits(Student, People);

Student.prototype.is = function() {
    return 'Student';
};

const s = new Student('RedHood');

expect(s.getName()).to.equal('RedHood');
expect(s.is()).to.equal('Student');
expect(s instanceof People).to.be.true;
